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A practical investigation to find the effects of exercise And smoking, and their effect on the respiratory And circulatory system. AIM The aim of this investigation is to study the effects that Smoking and exercise will have on the Respiratory and Circulatory System. I will do this by running up and down a flight of stairs, I will repeat this twice once with a cigarette and once without. Apparatus 1 female smoker (age 35) Flight of stairs (13 steps) A watch (to take pulse) A cigarette Prediction To make this a fair investigation I will use the same set of stairs Wear the same clothes and have the same amount of rest time for both investigations, the only thing that will change is I will have a cigarette on the second investigation. I believe that my pulse rate will increase more when I have had the cigarette, this is because Nicotine constricts terminal bronchioles , which decreases the respiratory efficiency in smokers. Method To start with I will take my pulse at resting rate, to do this place the middle and forth finger onto the inside of the wrist until the pulse rate could be felt. I then timed it for 15 seconds counting each beat at the same time , I then times this by 4 to get the bpm. Run up a